Extrusion for use in the construction of a window



FIG. 1 is a perspective view of an extrusion for use in the constructionof a window showing my new design, the extrusion being broken in thecenter to indicate indeterminate length; and,

FIG. 2 is an end elevational view thereof.

The ornamental design for an extrusion for use in the construction of awindow, as shown and described.